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  <title>Document</title>
  <style>
    /* body{
      background-color: #abcdef;
    } */
    .test {
      width: 20px;
      height: 160px;
      background-color: red;
      /* transform:translate(-50%,-50%); */
    }
    .cell {
      width: 100px;
      height: 100px;
      padding: 30px;
      background-color: #c9d5e0;
      border-radius: 20px;
      box-shadow: 15px 15px 15px -5px rgba(0, 0, 0, .15),
                  inset 8px 8px 5px rgba(255, 255, 255, .75),
                  -8px -8px 15px rgba(255, 255, 255, .55),
                  inset -1px -1px 10px rgba(0, 0, 0, .2);
    }
    .cell2 {
      margin-top: 50px;
      /* transform: rotate(180deg); */
      box-shadow: 8px 8px 5px rgba(255, 255, 255, .75),
                  inset 15px 15px 15px -5px rgba(0, 0, 0, .15),
                  -1px -1px 10px rgba(0, 0, 0, .2),
                  inset -8px -8px 15px rgba(255, 255, 255, .55);
    }
    .cell3 {
      margin-top: 50px;
      transform: rotate(180deg);
    }
  </style>
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</head>
<body>
  <!-- <h1>Hello World</h1>
  <div class="cell">
    <div>床前明月光</div>
    <div>疑是地上霜</div>
    <div>举头望明月</div>
    <div>低头思故乡</div>
  </div>
  <div class="cell cell3">
    <div>床前明月光</div>
    <div>疑是地上霜</div>
    <div>举头望明月</div>
    <div>低头思故乡</div>
  </div>
  <div class="cell cell2">
    <div>床前明月光</div>
    <div>疑是地上霜</div>
    <div>举头望明月</div>
    <div>低头思故乡</div>
  </div> -->
  <div class="test"></div>
  <div id="root"></div>
  <script src="js/react.js"></script>
  <script src="js/react-dom.js"></script>
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